I just switched from iPad 3 to an Air. Although I definitely appreciate the lighter weight, battery life is worrisome. Regardless of what people say about the iPad 3, mine had amazing battery life. On standby, it just seemed to last forever (and should, given the size of the battery). I've had my Air for only a few days, but the battery went down 15% basically in standby, which is disappointing. My old iPad 3 would still be at 100% by comparison. This seems completely different from what others have been experiencing. Will the battery re-calibrate eventually, or does it need a very long initial charge to reach its maximum capacity? The other issues with the Air I can live with. The screen has one piece of dust under it, but you have to look for it to notice it. There is a slight yellowish bar on the far left, which seems fairly common, but I can live with that, too. I couldn't accept subpar battery life, however, and I'd rather return this and get a different unit if this is not normal. Many thanks in advance.